Water-cooled ultra-violet apparatus



March 16 ,1926. 1,576,694

J. B. WANTZ WATER COOLED ULTRA VIOLET APPARATUS Filed Oct. 22. 1 2 Sheets-Sheet 1 Lt, 13 1 m i m z [i b LQJ b1 F\G.'Z

MVENTOR uuu s a.

March 16 1926.

J. B. WANTZ WATER COOLE D ULTRA VIOLET APPARATUS Filed Oct. 22, 1924 2 sh t -sh et r \NVENTOK Juuue a. WHNTZ RT RNEY &

Patented Mar. 16, 1926.

UNITED. STATES PATENT OFFICE.

JULIUS 2B. wmr'z, or onxarnnx, rumors, nssrenon 'ro vrc'ron x-BAY confou- TION, or CHICAGO, rumors, A CORPORATION or- NEW YORK.

WATER-COQLED ULTRA-VIOLET APPARATUS.

Application 'filed October 22, 1924. Serial No. 745,263.

To all whom it may concern: Be it known that I, JULIUs B. WANTZ, a citizen of the United States, residing at 324 North Harvey Avenue, Oak Park, in the county of Cook and State of Illinois, have invented newv and useful Improvements in Water-Cooled Ultra-Violet Apparatus, of which the following is a specification.

The present invention relates to an apparatus employed for the production of ultra-' violet rays and has particularly to do with a cooling system employed in conjunction with the lamp from which the ultra-violet emanations proceed.

Among the objects of the invention are the provision of means for adequately cooling a lamp intended. for the purpose indicated, means for cooling a liquid medium and circulating it about such lamp, the combination of air and Water cooling means in a single apparatus, and the adaptation of safety means for rotecting the apparatus against the possibility of incorrect connections with respect to the electric circuits therein.

Further object of the invention is to-provide visual signal means for determining the adequacy of the flow of such cooling medium and an additional object of the invention is to provide, in association with an ultra-violet apparatus a cooling device of unique and improved design Which will positively protect the lamp from overheating and at all times disclose to the operator the precise condition of the cooling fluid within such cooling system.

These, and such other objects as may hereinafter appear, are obtained by the combination, construction, and arrangement of the several elements which constitute the cooling system hereinafter to be described, which system is fully illustrated in the two sheets of drawing accompanying this specification and hereby made a part thereof.

Figure 1 is an elevation of an ultra-violet ray apparatus contained in a cabinet, the lamp beingdisassociated therefrom and the front of the cabinet removed;

Figure 2 is a plan view of the circulatory and cooling elements as disposed in said cabinet; and I t Figure 3 is a diagrammatic illustration of the wirin system employed.

Like reference characters are used to des+ ignate similar parts in the description which follows and in the several figures of the drawings.

The ordinal 10 is used to designate an upright cabinet for containing the apparatus except the lamp and from which the cover (not shown) is removed. Such cabinet may be provided with casters 11 for the purpose of ready transportation about the laboratory or office Where the apparatus is employed. As the invention resides in the cooling and wiring systems and the combination thereof,"

the various other parts of the apparatus will only be generally described. Those parts of the apparatus which are disclosed in Figure 1 comprise a-tungar transformer designated 12, tungar. rectifying'bulbs designated 13, a tungar reactance or choke coil identified by the numeral '14, ballast resistance identified by the numeral 15, a meter disposed upon the exterior of the cabinet and designated 16, and control or operating handles 17 and 18 disposed upon the opposite sides of the top of said cabinet adjacent meter 16.

,lVithout the cabinet 10! is di water jacketed hood 19 within WlllCh is a lamp (not shown) for supplying ultra-violet emanations. Such hood 19 is provided with an inlet pipe 20 and an outlet pipe 21, both pipes being flexible and joined to the water jacketed lamp casing 19 by suitable water tight connections as disclosed in Figure 1.

The system for circulating a cooling medium through the jacketed casing 19 comprises a pum 22 of the rotary type driven by motor 23 exibly connected to said pump osed a' at 24. Said'pump 22 and motor 23 are mounted upon a platform 25 having a plurality of legs 26 for securing it to the bottom of cabinet 10 while elevating said motor sufficiently to allow for unhampered rotation of fan 27 which is secured to motor 23.

Intermediate reservoir 28 and pump 22; is disposed a pipe 30 which is joined to the base of radiator'section 29. From the rotary pump 22 the water drawn from reservoir 28 through pipe 30 is forced to the jacketed casing 19 through the inlet pipe 20.

Such water as' has been forced into jacketed casing 19 by rotary pump 22 is discharged from said casing through pipe 21 into a member comprising a basin or bowl 31, preferably of metal. Said bowl 31 has a funnel shaped bottom orificed at 32 to permit of the flow therefrom of any liquid which may gather in said bowl 31. A discharge pipe 33 is connected to orifice 32 and discharges fluid from bowl 31 into reservoir 28. Preferably the discharge pipe 33 is connected to a cap 28 for the opening in reservoir 28 to allow it to be filled and refilled. The bowl 31 terminates in a flanged top abutting the top of cabinet 10, such flanged portion determining the position of bowl 31 with respect to the top of said cabinet.

Pipe 21 is directly connected to an elbowed member 35 comprising an horizontal section substantially in alignment with pipe 21 and a vertical section connected to said horizontal section and terminating in a vent or opening 36 at the topmost portion thereof. A transparent glass cylinder or bell 37 having a closed end 38 is made to fit snugly into the cylindrical portion of Vessel 31. The open portion of such glass cylinder 37 rests upon the bottom of said metallic vessel 31 while the closed end 38 of said glass cylinder 31 completely surrounds the orifice or vent 36 in elbowed member 35. Water is forced from the jacketed casing 19 through the pipe 21 into the elbowed member 35 completely enclosed within vessel 31 and its glass covering 37. The force with which cooling water is discharged from pipe 21 into elbowed member 35 forces a jet to play upon the end 38 of glass cover 37. After striking cover 37 the water is scattered about and its force is lost permitting it to fall into funnel shaped vessel 31 to be carried b pipe 33 to reservoir 28.

The circu ation of cooling medium, hence, is from the pump 22 through conduit 20 to jacketed casing 19 where the cooling effect upon the lamp is produced; from jacketed member 19 through conduit 31 an elbowed member 35 from which it is discharged through the ,vent 36 against the closed end 38 of the glass cylinder 37; through the base of member 31, orifice 32, pipe 33 to reservoir 28; through the lower section 29 of said reservoir, into pipe 30 and back to pump 22 to again be circulated through the system.

The operator of the apparatus may always determine the fiow of the cooling medium by visualizing the jet of water forced out of vent 36. If the water in the system becomes too hot, excessive vapor or condensation will display itself in glass cylinder 37. Should'the flow of water become reduced or cease through obstruction or lack of water in the circulatory system, such fact will be instantly communicated to the operator through his sense of sight. 7

It is sometimes desirable to employ in a single apparatus lamps requiring different voltage as, for example, a fifty volt lamp, and a seventy to ninety volt lamp. In the device here illustrated, the fifty volt lamp is water cooled but the seventy to ninety volt lamp is air cooled. Sufficient voltages change the character of the emanations from the lamps, and a lamp of lower voltage has the greater tissue destroying effect. Reference should now be had to Figure 3 in order to understand the wiring system of the device. In View of the different voltages required because of the use of lamps of different capacities, and because it is desirable to water cool the fifty volt lamp and air cool the other, it is necessary to design a wiring system which will cause the circulatory system to act onl when the fifty volt lamp is used, and which shall cut out the motor driving the pump and fan when the seventy to ninety Volt lamp is employed. Incidentally it is necessary to prevent a lamp of low voltage from being charged with current from a circuit of higher volta e.

Numerals 50 and 51 indicate mains leading into the tapped primary winding of a transformer 52, designated 12 in Figure 1. A line switch 53 may be arranged upon said mains 50 and 51.

The diagram indicates that the rectifying bulbs 56, designated 13 in Figure 1, haveindependent secondaries, but these rectifying bulbs could be directly connected by tapping the secondary of transformer 52. Said rectifying bulbs 56 convert the alternating current induced in the tapped secondary winding of transformer 52 into unidirectional pulsating current, which current is conveyed, in a manner now to be described, to the lamp through mains 5 1 and 55 connected to the terminals of said secondary winding of transformer 52.

The water cooled lamp is designated by the numeral 57. The circuit for said lamp 57 comprises the main 55 from one terminal of transformer 52, a reactance-coil 58 designated 14 in Figure 1, a resistance 59 designated 15 in Figure 1, a main 60, water cooled lamp 57, a main 61, to a selector switch 62, and from said switch 62 through main 54 back to the other terminal of the secondary of transformer 52. With the closing of the switch 62 for the purpose of connecting mains 61 and 54, a second closed circuit is established which circuit serves the motor 23 driving pump 22 and fan 27 referred to above. Said motor 23 is fed by a circuit comprising a main 63 from one terminal of the secondary of transformer 52 to motor 23,

to a main 64, to switch 62, and by way of main 54 to the other terminal of the secondary of transformer 52.

In the connections referred to, the circuits relating to the seventy to ninety volt air cooled lamp are open. It is impossible to close the water coo ed lamp circuit without concurrently closing the motor circuit just described. It is, therefore, impossible to o erate the water cooled lamp without esta lishing connections for the cooling system therefor.

In using the air cooled lamp, designated 65,,the circuits are as follows. In the case of a seventy volt current, the circuit is established through main 55, connected to one terminal of the secondary of transformer 52, reactance coil 58, resistance 59, a main 66 to lamp 65, main 67 to selector switch 62, and main 54 to the other terminal of the secondary of transformer 52.

In the ninety volt circuit, the connections are through said main 55 from one terminal of the secondary of transformer 52, reactance coil 58,.a main 68, selector switch 62, a main 69 to resistance 59, main 66 to lamp 65, main 67 to selector switch 62, and main 54 to the other terminal of the secondary of transformer 52.

In this manner the resistance 59 is adapted to control the current required by its adjustability. In the case of the water cooled lam a pressure of fifty volts is obtainable, while in the case of the air cooled lamp, resistance is reduced so that a voltage of seventy volts may flow, and in order to permit of the employment of a ninety volt current, the resistance may be further reduced by short circuiting a portion thereof.

A voltmeter 70 is disposed intermediate mains 54 and 60 in order that the o erator may check up the voltage passing't rough the lamp, said meter 70 in Figure 3 corresponding to meter 16 of Figure 1. Control handles 17 and 18 in said'Figure 1 operate line switch 53 and selector switch 62 of Figure 3.

In practice, a separate plug .connection is arranged upon the side of cabinet 10 for the lamp of higher voltages, such plug connection being adjacent to and of a diflerent construction from the plug connection for said water cooled lamp.

I claim 1. The combination with an ultra-violet apparatus including aplurality of lamp circuits of different voltage values, of a cooling system comprising a jacketed lamp casing, a source of electro-motive force, conduits to and from said casing for the flow of a liquid cooling medium, and a cabinet enclosing a selector switch and a pump, prime mover, radiator, andfan for circulating and cooling said medium, said prime mover comprising an electric motor directly driving said pum and fan, and said selector switch being a apted to open and to close the circuit to said motor according to the voltage value of said lamp circuits.

* 2. The combination with an ultra-violet 7 ray apparatus of a cooling system comprising a jacketed lamp casing, a source of electro-motive force, conduits to and from said casing for the flow of a liquid cooling medium, and a cabinet enclosing a pump, prime mover, radiator, and fan for circulating and coolin said medium, said prime mover comprising an electric motor for driving said pump-and fan, and in which the conduit from said casing comprises a discharge pipe having anopening at its top, a vessel surrounding said pipe and having an outlet port at its bottom, and a covering for said vessel having an end for dis ersing and equalizing the distribution 0 the cooling medium as it is forced from said discharge pipe. I

3. The. combination with an ultra-violet ray apparatus of a cooling system comprising a jacketed lamp casing, a source of electro-motive force, conduits to and from said casing for the flow of a liquid cooling medium, and a cabinet enclosing ,a pump, a prime mover, radiator, and fan for circulating and cooling said medium, said prime mover comprising an electric motor for driving said ump and fan, and in which the conduit f fom said casing comprises a cylindrical vessel provided with an orificed bottom for the passage of the cooling me- 1 dium into said radiator and having an upright section throu h which said cooling medium is vertical y discharged, and a transparent bell-like cap for said vessel concentrically arranged upon and depending into said vessel and so disposed that its inner wall receives theimpact of the jet of cooling medium from said upright section when said cooling system is normally operating.

4. The combination in an ultra-violet ray apparatus of electrical circuits for diflerent voltages, lamps for said circuits, a cooling system comprising a jacketed lamp casing in association with one of said circuits, conduits to and from said casing for the flow of liquid cooling medium, a cabinet enclosing a pump, prime mover, radiator, and fan for clrculatlng said medlum, and means for opening the circuit to said motor when a different circuit is employed, and. in which the circuits are three in number, a single air cooled lamp being adapted to be used upon two of said circuits, the third circuit being associated with said cooling system, said circuits having a single operating switch'adapted to include said motor in circuit only when the last mentioned circuit is closed.

JULIUS B. YWANTZ. 

